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このたび、2026年9月29日(火)に特別講演会 を開催いたします。
日時:2026年9月29日(火)10:00–11:00
会場:東北大学 流体科学研究所 1号館2階会議室 および オンライン(Google Meet)
https://meet.google.com/xnc-vhkr-qjr
講師:
James S. Cotton
McMaster University (Canada) 教授
講演題目:
Electrohydrodynamic heat transfer in phase change materials – Collaboration with Institute of Fluid Science
講演内容:
Electrohydrodynamics (EHD) offers a powerful means of enhancing and actively controlling solid-liquid phase-change heat transfer. Applied electric fields generate electroconvection that thins thermal boundary layers, accelerates melting, and can induce solid extraction, in which dendritic material is drawn from the mushy zone into the liquid phase. Experiments have demonstrated local heat-transfer enhancement approaching 8.6-fold and reductions in total melting time of nearly 40%. Schlieren velocimetry has revealed coherent EHD jets and provides a non-intrusive means of quantifying the resulting flow and thermal-boundary-layer transport. Particular attention is given to the distinction between conventional charge injection and field-enhanced dissociation. Charge injection relies on ions generated at electrode surfaces, whereas low-frequency alternating-current dissociation produces reversible ionic motion within the dielectric fluid, potentially reducing electrode-driven chemical degradation while generating directed transport toward the melt interface. These mechanisms create new opportunities for electrically tunable, high-performance phase-change thermal energy storage.
プログラム (PDF)
※本講演会は、東北大学流体科学研究所・公募共同研究(J26I085)の支援を受けています。
ご関心をお持ちの皆様のご参加を心よりお待ち申し上げております。
どうぞよろしくお願いいたします。
【お問合せ先】
東北大学流体科学研究所
佐藤 岳彦
Tel: 022-217-5320
E-mail: takehiko.sato.d7*tohoku.ac.jp
*を@に変えてお送りください。
日時:2026年9月29日(火)10:00–11:00
会場:東北大学 流体科学研究所 1号館2階会議室 および オンライン(Google Meet)
https://meet.google.com/xnc-vhkr-qjr
講師:
James S. Cotton
McMaster University (Canada) 教授
講演題目:
Electrohydrodynamic heat transfer in phase change materials – Collaboration with Institute of Fluid Science
講演内容:
Electrohydrodynamics (EHD) offers a powerful means of enhancing and actively controlling solid-liquid phase-change heat transfer. Applied electric fields generate electroconvection that thins thermal boundary layers, accelerates melting, and can induce solid extraction, in which dendritic material is drawn from the mushy zone into the liquid phase. Experiments have demonstrated local heat-transfer enhancement approaching 8.6-fold and reductions in total melting time of nearly 40%. Schlieren velocimetry has revealed coherent EHD jets and provides a non-intrusive means of quantifying the resulting flow and thermal-boundary-layer transport. Particular attention is given to the distinction between conventional charge injection and field-enhanced dissociation. Charge injection relies on ions generated at electrode surfaces, whereas low-frequency alternating-current dissociation produces reversible ionic motion within the dielectric fluid, potentially reducing electrode-driven chemical degradation while generating directed transport toward the melt interface. These mechanisms create new opportunities for electrically tunable, high-performance phase-change thermal energy storage.
プログラム (PDF)
※本講演会は、東北大学流体科学研究所・公募共同研究(J26I085)の支援を受けています。
ご関心をお持ちの皆様のご参加を心よりお待ち申し上げております。
どうぞよろしくお願いいたします。
【お問合せ先】
東北大学流体科学研究所
佐藤 岳彦
Tel: 022-217-5320
E-mail: takehiko.sato.d7*tohoku.ac.jp
*を@に変えてお送りください。
